Good morning sippyuconn.
The method of tying OnSettingsModified from the assembly to
Configuration_OnValid depends on how Settings implements the ISettings
interface: either explicitly or implicitly. I will go through each
possibility with you and provide the solution respectively.
=====================================
Possibility 1: 'Settings' IMPLICITLY implements 'ISettings'
public interface ISettings
{
event EventHandler OnSettingsModified;
}
public class Settings : ISettings
{
private void textEdit_EditValueChanged(object sender, EventArgs e)
{
if (OnSettingsModified != null)
{
OnSettingsModified.Invoke(sender, e);
}
}
#region ISettings Members
public event EventHandler OnSettingsModified;
#endregion
}
The code "public event EventHandler OnSettingsModified;" tells that
'Settings' is implicitly implementing 'ISettings', and the event is a part
of the class, so we can add the event handler by writing this code:
Settings mySettings = new Settings();
mySettings.OnSettingsModified += new EventHandler(Configuration_OnValid);
=====================================
Possibility 2: 'Settings' EXPLICITLY implements 'ISettings'
public class Settings : ISettings
{
public void textEdit_EditValueChanged(object sender, EventArgs e)
{
if (OnSettingsModified != null)
{
OnSettingsModified.Invoke(sender, e);
}
}
event EventHandler OnSettingsModified;
#region ISettings Members
event EventHandler ISettings.OnSettingsModified
{
add
{
lock (OnSettingsModified)
{
OnSettingsModified += value;
}
}
remove
{
lock (OnSettingsModified)
{
OnSettingsModified -= value;
}
}
}
#endregion
}
In this implementation, the event OnSettingsModified is not exposed as a
public event from the class 'Settings', thus, we cannot tie the event
handler in the same way as "possibility 1". The event is a part of the
interface, so the right way to add the event handler is:
Settings mySettings = new Settings();
ISettings iSettings = (ISettings)mySettings;
iSettings.OnSettingsModified += new EventHandler(Configuration_OnValid);
For more information about explicitly implementing an interface event,
please refer to the MSDN article:
http://msdn.microsoft.com/en-us/libr...46(VS.80).aspx http://msdn.microsoft.com/en-us/libr...57(VS.80).aspx
sippyuconn, is the above information helpful to you? If it cannot help you
with the question, I appreciate it if you could share more implementation
of the class 'Settings' or send a small reproducible project to my mailbox:
ji****@microsoft.com
Have a very nice day!
Best Regards,
Jialiang Ge (ji****@online.microsoft.com, remove 'online.')
Microsoft Online Community Support
Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
ms****@microsoft.com.
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